Wrench.



V. PIPS-HiK.

PatentedAug. 21 1917.

INVENTOR ATTORN EY c To all whom it may concern.-

' vnnnn rrun nrsnrx, orfnnw YORK, N. Y.

WRENCH.

Be it known that I, VALEN'nNnPirsnIK, a citizen of the United States, residmg at New York, in the countyof New York and State of New York, have invented new and useful Improvements in Trenches, of which the following is a specification.

. This invention relates to. wrenches, and more especially to those havingya sliding jaw with a handle lever grip; and the object of the same is to simplifythe construction of pivots as one of the such wrench and utilize. one of the handle guides for. connecting the jaws.

In its completeness my wrench is adaptable to nuts: of various sizes within limits,

straining applied to, its handle lever only increases its grip on the nut or object being clampechand by. using the tool one side up or the other the nut may be screwed on or off as desired.

Details. are set forth in the following specification, reference being had to the accompanying drawings wherein Figure 1 is a side view of this wrench in the act of being applied {to a nut which is to be unscrewed, and

F ig.- 2is a. similar view applied to a smaller nut which also is to be unscrewed.

Fig. 3 is a perspective detail of the movable members of the wrench slightly separated.

Fig. 4. is a perspective detail of the male member in slightly modified form.

Fig. 5 is an edge view of the handle.

In the drawings the letter N designates a nut, and this is typical of any object that is to be grasped by the jaws and screwed onto a bolt or other threaded member or be unscrewed therefrom. My wrench as a whole comprises a handle or lever H, a male member M and a female member F; and,

i with the exceptions hereinafter described,

these may be of any materials, size, and detailed construction without departing from the principle of the invention.

The handle H has a straight body 1 bifurcated or forked at its upper end as at 2 and provided in its fork-arms with a hole 3 and a slot 4, both being of appropriate width I to receive the pins hereinafter described.

a The fork-arms are spaced suiiiciently to permit the free movements between them of the head portions or jaws of the members Specification of Letters Patent.

or jaw 10 whose working face 11 might be flat but is herein shown as angular so as to contact with two faces of a hexagonal nut as seen in Figs. 1 and 2, and a shank 12 below and integral with the head, standing substantially at right angles thereto and pro jecting beyond said face 11 for some little distance. The shank of this member is of equal width or thickness with the head as best seen in Fig. 3 but is bifurcated longitudinally as at 13 to produce two arms slightly spaced, as shown, the bifurcation extending through the head 10 and forming a face 1% .yet to be referred to. Through these arms near their outer ends is fastened a pin 15 whose extremities enter loosely the holes 3 in the fork arms 2 of the handle H.

The male member M has a complementary head or jaw 20 with a working face 21, and a pin 25 is fixed through this head, its extremities working in the'slots 4; in the fork arms 2 of the handle. This member also has a shank 22 below and integral with the head 20, standing substantially at right angles thereto, and projecting beyond said face 21 for some little distance. The shank isof va size to fit slidably into the bifurcation 13 in the shank 12 of the female member with its upperyedge 24 moving beneath said face 14.

Within the length of the shank is a slot 23 slidably engaging the pin 15. The modification in Fig. 5 simply carries the .slot 23 out the end of the shank as shown at 23. As every slot which is not closed at one end is weaker than slots that are closed at both ends, I prefer to close the slot where possible. But with the modified form of this member it is possible to slip it onto the female member by inserting the shank 22 in the bifurcation 13 and running the slot 23' over the pin 15 without necessarily with drawing the latter. As both pins 15 and 25 are fast in their members and loose in the fork-arms of the handle, means must be provided for holding them so. It is quite possible to use bolts instead of these pins, extending them through the parts which they are to connect and letting the head and the nut of each bolt hold it in place; or in a cheap form of the wrench it might be possible to employ rivets and upset their extremities. I prefer, however, that the pins shall be fast in the movable members and loose in the fork-arms of the handle.

With this construction, the use of my wrench is as follows: When the handle is Patented Aug. 21, 1917.

I Application filed March 3, 1917. Serial No. 152,284.

moved to the left in Fig. 1, its hole moves spread apart and their jaw faces 11 and 21 separated. The-tool is now passed over an;

article such as the nut N, after which the handle is moved in the opposite direetion.-

Thismoves the members relatively toward each other and causes the jaw faces to clasp -opposite faces of the nut N, after Which further movement of the handle turns the nut in the present instance to the le'ftto unscrew it. It will be obvious that by areversal of the wrench, the forcible turning oft'he nut would screw it on instead of unscrewing it from an object such as a screw. When the jaw faces clasp the 'object'N and pressure isapplied, the tendency is of course to throw each jaw outward relatively to the other, orlin other words to turn it out of a position at right angles to the line on which the members slide 011 each other. The effect of this tendency is to move the head 10 outward and downward so that its face 14 contacts with the upperedge 24: of the shank 22 of the male member, but the descent of this shank is resisted by the fact that the pin 15 engages the slot 23. Therefore the pin 15 and the face 14. coact to resist thespreading tendency of the jaws, and this I consider the most important feature of my invention. 1- mightsay in closing that while I have-shown a hole at 3 and a slot at eachfork arm ofthe, handle, the

position of the holes andslot s might be reversed. It is only necessary that when the handle is thrown to an oblique position as seen in Fig. 1, one of the bearings shall r0- 'tate on its pin and the other shall slide slightly on its pin for obvious reasons.

What isclaimed as new is The herein described sliding jaw-wrench comprising a male member consisting of a head having a jaw face, and a shank narrower than and underlying said head, integral therewith, standing at right angles thereto," and projecting beyond its jawface, the'shank having a longitudinal slot and the head having a transverse pin; a female member consisting of a head having a jaw face, and a shank of the same width as and underlying said head, integral therewith, standing at right angles thereto, and projecting beyond its jaw face, the shank being bifurcated-throughout its length'to produce arms lapping the shank of the male member and the bifurcation extending beneath the headand forming a-face thereunder, and a pin through said arms-remote" from the head and slidably engaging the slot in the male shank while the upper edge-of the latter slidably engages beneath said face; anda handle lever forked at one end to embrace the widest portions of both members and provided with alined holes and slots in its fork-arms respectively engaging said pin testimony whereof I a-ffix my signature.

VALENTINE PIPSHIK.

Copies of this patent may 'be obtained for five cents each' by addressing the Commissioner of Patents, Washington, 13:03 r 

